If the water will NOT shut off by pushing the timer knob in or by unplugging the washer the water inlet valve has stuck open and it will need to be replaced.
If the water WILL shut off by pushing the timer in or by unplugging the washer then the likely failure is the water level pressure switch or the water level pressure switch hose has an air leak/hole in it somewhere. If the pressure switch air hose has no holes in it, replace the water level pressure switch.
In order to access and check to see if the water level pressure switch hose has pulled off the water level pressure switch and to check the pressure switch hose for leaks will require placing the control panel in the service position and removing the washer cabinet.
First, disconnect the power cord from the power source
The console (key#26) will need to be placed in the service position by removing two (2) hidden screws, one (1) screw is located at the bottom of the left hand end cap (key#7) and one (1) screw is located at the bottom of the right hand end cap (key#10).
In order to access these two (2) hidden screws, the left hand end cap trim (key#8) and under the right hand end cap trim (key#11) will need to be removed.
To remove the trim (key#8&11), place you finger behind the trim at the very top and bend it up enough to clear the console and then hinge it towards the front and off. See second image below.
Remove the hidden screw under each end cap trim. Slide the console forwards about 1/4 inch and the raise it upwards and hinge it over the rear panel.
Disconnect the 3 wire lid switch harness plug located on the top. Pop the two (2) gold colored cabinet retainer clips off. See third image below.
Place the tip of a flat tipped screw driver down into the first valley and then push the handle end to the rear of the washer to pop off the cabinet clips.
Open the lid and grab the opening and tilt the top of the washer cabinet forwards just a few degrees and then walk it backwards and off.
You now have full access to the water level pressure switch hose.
Reverse the procedure to re-assemble the washer cabinet.